Data are presented on distribution and ecology of 10 rare liverwort species (Anastrophyllum sphenoloboides, Arnellia fennica, Haplomitrium hookeri, Cephalozia macounii, Cephaloziella elachista, Lophozia ascendens, Nardia japonica, Scapania scandica, Schistochilopsis laxa, Sphenolobus cavifolius) included in the Red Data Book of the Komi Republic, and 8 species (Dichiton integerrimum, Harpanthus scutatus, Kurzia pauciflora, Lophozia pellucida, Lophozia perssonii, Odontoschisma denudatum, Scapania nemorea, Schistochilopsis hyperarctica) suggested for inclusion in the new edition of the Red Data Book of the Komi Republic.
